MARSHFIELD - Without any significant leads to date, authorities hope forensic test results due next week will help identify who built a homemade pipe bomb discovered Sunday in the Brant Rock esplanade.

Marshfield Police Chief Phillip Tavares on Thursday said his department has fielded many calls from the public with tips regarding the device, but none has helped police identify a potential suspect.

“We’ve been getting them steadily, and some you can automatically rule out, but even those that are a long shot we have to investigate,” he said. “It would be a lot easier if we knew who was the victim was, and we could try to figure it out that way. … But we’re still looking for tips. Usually (bomb-makers) tell at least someone else.”

The State Police Bomb Squad detonated the pipe bomb, which was discovered by a passer-by on Ocean Street on Sunday afternoon. The road was evacuated for hours and residents were told to stay in their homes.

Tavares said investigators now believe the bomb came from a moving car and was intended for a specific individual.

Calling the device “pretty sophisticated,” Tavares said the person who made the bomb had to have some experience to be able to build it without being injured.

Tavares said he hopes forensic evidence collected from the bomb – including any DNA or fingerprints – will push the investigation forward.

Jennifer Mieth, public information officer for the state Department of Fire Services, said the results are due back next week, but will not be released to the public unless an arrest is made.

While several nearby businesses have surveillance cameras, Tavares said none was close enough to capture the device falling from a vehicle.

“I want people to know (the intended target) doesn’t have to be a Marshfield resident,” he said. “They may have visited that weekend, or were in the area and (the bomb) could have fallen off.”

A $5,000 reward is being offered for information leading to an arrest.